Bridging Past and Present: SUZUKI GSX1100S KATANA Custom by TG-RUN

TG-RUN's GSX1100S KATANA

Based on the Final Edition, each part was rebuilt, and the parts necessary to ride an air-cooled Katana in the modern era were changed. On top of that, this KATANA has been converted to 18-inch front and rear, and controls such as the seat and steps have been updated. The work was done by Technical Garage RUN, and it is designed as an answer to the question of what is necessary to ride '80s models in the future. Mr. Sugimoto from the store explains, "First of all, I would like to say that even if a brand-new machine from that time were reproduced here without aging, it would still be insufficient in today's environment. The GSX1100S Katana was the top model at the time, and it was designed for the environment of the time. Therefore, if you look at it now, you will find some parts that are lacking. Let's also throw out the idea that the Katana has the Final Edition. The basics are still the same as they were 40 years ago, and the model is already 20 years old. I really want you to grasp and understand that." The environment refers to the road conditions and the amount of traffic, and also the improvement in technology. We want to be aware of that. So, what is lacking?

"It's the safety and security. The first step is the brakes. The master cylinder, calipers, pads, and discs. We will replace these with modern, reliable parts to ensure braking power and control. Then, naturally, the lack of capability of the front and rear suspension will also be noticeable, so we will work on upgrading them. Ideally, the front forks should be replaced as well as the rear shocks, but depending on the model, user preference, and usage, internal tuning can be used to address this issue. This would also mean replacing the tires with modern, reliable ones that bring out the best in braking power and suspension performance. Even if your Katana comes with 19-inch front tires as stock, choose NEW-spec compliant ones to ensure a good grip. These critical safety parts will also be lacking, so make sure they are newer generation and reliable. If in perfect condition, the Katana has the power to cruise at 200 km/h with room to spare. But even if it is in perfect condition, it is difficult to cope with sudden accidents or unexpected problems with the stock parts. It is an old bike. I think it is the duty of the rider to understand that." It is important to control the speed and posture of the bike and to be able to stop properly. This should be considered first. This is true even with a new machine. So, if the machine is old, we should think about rebuilding the base of the bike to compensate for what's lacking, after bringing it to a state close to that of a new bike. "There are many people who recognize this and leave the frame, exterior, and wheels as stock, but clean it up, repaint it, and then make up for the things that are lacking as mentioned above. The same goes for engine overhauls and carburetors. Consumables, electrical systems, and other items that are likely to deteriorate in the future are replaced or refinished with new parts, and the machine is reset to start again from this point. The necessary parts are lubricated and oiled in appropriate amounts, bolts are replaced with new ones, and the correct tightening torque is managed using a torque wrench. Then, balancing is performed, and the bike is finished." The combination of overhaul and upgrade is the only way to enjoy an '80s bike. "If you reset it like this and rebuild it to fit the current environment, you can use that as a starting point. We've done some upgrades with this complete custom, and I think the owner will be able to enjoy it for a long time." In order to ride the classic Katana now, the base was rebuilt and converted to 18-inch front and rear, and further tweaks were made to reduce weight and enhance the quality feel. This machine is an example of TG-RUN's Version Up Complete and is an example of what Mr. Sugimoto has described so far.

Handle

The top bridge and stem with Final Edition serial plate are stock, the fork offset is the stock 50mm, the handlebars are stock forged clip-ons, and the meter is stock one-body.

The front master is Brembo Racing, and the pivot pin has been modified to prevent it from slipping out, which is standard for TG-RUN original menus. The clutch is a stock wire type. The mirrors are Magical Racing NK-1 Mirror Type 1.

Bodyworks

The fuel tank and other exterior parts are stock GSX1100SY (Final Edition) and are in good condition.

The seat is a TG-RUN Sport & Comfort seat made of memory foam, which optimizes the seating position and improves footing, as well as control and comfort. It is recommended for those who want to ride the Katana now.

Engine

The 1074cc engine is stock and well-maintained. It's installed in the specified position with the TG-RUN Billet Engine Mount Kit machined from A2017, which also improves handling.

The BS34 carburetor is also stock. The frame was inspected, then painted black instead of the original silver. This inspection and repainting will prolong the bike's lifespan.

Chassis

The steps are TG-RUN's Variable Step Kit for improved operability. Frame reinforcement above the pivot is a feature of the stock Final Edition.

The front forks are stock φ37mm and have been re-set with spring changes and other modifications. The front brakes feature Brembo Axial CNC 4P Calipers and Sunstar Works Expand Discs.

The rear brake and aluminum swingarm are Katana stock, and the rear shock is a fully adjustable Ohlins. The exhaust system is K-Factory Full Titanium.

The wheels are forged aluminum PMC Sword Heritage converted to 2.75-18/4.00-18 size from 1.85-19/2.50-17. The drive chain is also converted to RK's 525XXW, as part of reducing weight and increasing precision.

Gallery

Specifications

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